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Annotation of sys/arch/sparc/dev/fdreg.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: fdreg.h,v 1.5 2004/09/22 22:12:58 miod Exp $  */
                      2: /*     $NetBSD: fdreg.h,v 1.6 1997/05/02 13:03:44 pk Exp $     */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. Neither the name of the University nor the names of its contributors
                     17:  *    may be used to endorse or promote products derived from this software
                     18:  *    without specific prior written permission.
                     19:  *
                     20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     30:  * SUCH DAMAGE.
                     31:  *
                     32:  *     @(#)fdreg.h     7.1 (Berkeley) 5/9/91
                     33:  */
                     34:
                     35: /*
                     36:  * AT floppy controller registers and bitfields
                     37:  */
                     38:
                     39: /* uses NEC765 controller */
                     40: #include <dev/ic/nec765reg.h>
                     41:
                     42: #ifndef _LOCORE
                     43: struct fdreg_77 {
                     44:        u_int8_t        fd_statusA;
                     45:        u_int8_t        fd_statusB;
                     46:        u_int8_t        fd_dor;         /* Digital Output Register (R/W) */
                     47:        u_int8_t        fd_tdr;         /* Tape Control Register (R/W) */
                     48:        u_int8_t        fd_msr;         /* Main Status Register (R) */
                     49: #define fd_drs         fd_msr          /* Data Rate Select Register (W) */
                     50:        u_int8_t        fd_fifo;        /* Data (FIFO) register (R/W) */
                     51:        u_int8_t        fd_reserved;
                     52:        u_int8_t        fd_dir;         /* Digital Input Register (R) */
                     53: #define fd_ccr         fd_dir          /* Configuration Control (W) */
                     54: };
                     55:
                     56: struct fdreg_72 {
                     57:        u_int8_t        fd_msr;         /* Main Status Register (R) */
                     58: #if already_a_define
                     59: #define fd_drs fd_msr                  /* Data Rate Select Register (W) */
                     60: #endif
                     61:        u_int8_t        fd_fifo;        /* Data (FIFO) register (R/W) */
                     62: };
                     63:
                     64: union fdreg {
                     65:        struct fdreg_72 fun72;
                     66:        struct fdreg_77 fun77;
                     67: };
                     68: #endif
                     69:
                     70: /* Data Select Register bits */
                     71: #define DRS_RESET      0x80
                     72: #define DRS_POWER      0x40
                     73: #define DRS_PLL                0x20
                     74: #define        FDC_500KBPS     0x00            /*   500KBPS MFM drive transfer rate */
                     75: #define        FDC_300KBPS     0x01            /*   300KBPS MFM drive transfer rate */
                     76: #define        FDC_250KBPS     0x02            /*   250KBPS MFM drive transfer rate */
                     77: #define        FDC_125KBPS     0x03            /*   125KBPS  FM drive transfer rate */
                     78:
                     79: /* Digital Output Register bits (modified on suns) */
                     80: #define        FDO_DS          0x01            /*  floppy device select (neg) */
                     81: #define        FDO_FRST        0x04            /*  floppy controller reset (neg) */
                     82: #define        FDO_FDMAEN      0x08            /*  enable floppy DMA and Interrupt */
                     83: #define        FDO_MOEN(n)     ((1 << n) << 4) /* motor enable */
                     84: #define FDO_DEN                0x40            /* Density select */
                     85: #define FDO_EJ         0x80            /* Eject disk */
                     86:
                     87: /* Digital Input Register bits */
                     88: #define        FDI_DCHG        0x80            /*   diskette has been changed */
                     89:
                     90: /* XXX - find a place for these... */
                     91: #define NE7CMD_CFG             0x13
                     92: #define CFG_EIS                        0x40
                     93: #define CFG_EFIFO              0x20
                     94: #define CFG_POLL               0x10
                     95: #define CFG_THRHLD_MASK                0x0f
                     96:
                     97: #define NE7CMD_LOCK            0x14
                     98: #define CFG_LOCK               0x80
                     99:
                    100: #define NE7CMD_MOTOR           0x0b
                    101: #define MOTOR_ON               0x80
                    102:
                    103: #define NE7CMD_DUMPREG         0x0e
                    104: #define NE7CMD_VERSION         0x10
                    105:
                    106: #define ST1_OVERRUN            0x10
                    107:
                    108: #define NE7_SPECIFY_NODMA      0x01